package com.zyk.stone;

public abstract class Token {
	public static final Token EOF = new Token(-1){}; //end of file
	public static final String EOL = "\\n"; //end of line
	private int lineNumber;
	
	protected Token(int line) {
		lineNumber = line;
	}
	
	public int getLineNumber() { return lineNumber; }
	public boolean isIdentifier() { return false; }
	public boolean isNumber() {return false;}
	public boolean isString() {return false;}
	public int getNumber() { throw new StoneException("not number token");}
	public String getText() {return "";}

}


